Building-block.



CAI'MAN BAUM, 0F SWEETSERS, INDIANA.

BUILDING-BL'OCK.

Speofication of Letters Patent. p

w Patented Sept. 3, 1918.

Application filed February 14, 1918. Serial No. 217,058.

tion is provided for the block and for the`` bin or wall, and soarranged as to prevent the entrance of mice, moisture and the like, orthe escape of grain.

In the drawings:

Figure 1 is a perspective view of a wall constructed of theimprovedblocks;

Fig. 2 is a Vertical section through a portion of the wall;

' Fig. 3 is a Vertical section of a modified type of block.

In the embodiment of the invention shown in Figs. l and 2, the wall iscomposed of hollow blocks 1, the said blocks being formed of plasticmaterial capable of hardening, as, for, instance,rconcret e orthe like,and the blocks are laid in the usual manner in courses withmortar,indica'ted at 2, between the blocks of the courses and between thecourses.

As shown, the blocks forming the Wall in Fig. 1 are hollow, and eachblock is provided at each face with a series of openings 3 and 4,respectively, all of thesaid openings inclining downwardlytowardthefiouter faces of the block. Referring to Fig. 2, it will benoticed that the openings at the outer .face of the block inclineupwardly toward the interior of the block, that is, toward the hollow,and the openings at the inner face of the block are similarly inclined.Hence whichever face of the block is outward, no moisture can enter, norcan any grain escape, the downward inclination of the openings at theinner face of the wall preventing such escape. to permit the entrance ofa mouse, and the wall is thus mouse-proof as Well as moistureandgrain-proof.

If desred, the blocks may be as indicated in Fig. 8. In thisconstruction each block 5 has a series of transverse openings, each ofwhich consists of portions 6 and 7 meeting at an angle at lthe center ofthe block. With this arrangement grain cannot flow up the inclinedportion, and moisture cannot pass in from the outside. The openings 6-'7are also too small for the entrance of mice. Thus there is a perfectventilation for the interior of the Wall and of the block, while at thesame time there is no possibility of the entrance of moisture, nor ofthe escape of gmin.

A I claim:

A building block having series of openings in the oppositefaces'thereof, the openings of each series inclining inwardly andupwardly and being of relatively small diameter and having communicationat their adjacent ends. '1 i oAnMAN BAUM'.

The openings are too small

